ON THE GEOGKArHY AND GEOLOGY OF THE ATLAS RANGES. 169 



Ruta chalepehsis, L., var. a. (R. angustifolia, Pers.) 

 Adenocarpus anagrjrifolius, Coss. et Bal. 

 Oenista florida, L., var. maroccana. 

 {Jytisus Balansce, Boiss., var. atlanticus. 

 Ononis Thomsoni, Ball MSS. (to figure). 



,, viscosa, DC, var. angnstifolia ? 

 an Medicago suffruticosa, Ram. ? 

 Trifolmm, cf. T. humile, Ball. 

 Anthyllis vulneraria, L. 

 Ennacea pungens, Boiss. 

 Astragalus ochroleucus, Coss. 

 Lotus corniculatus, L. 

 Potentilla replants, L. 

 Saxifraga gramdata, L. var. 

 Ribes grossularia, L., var. atlantica, Ball. 

 Cotyledon umbilicus, L., var. horizontalis. 

 Sedum altissimum, Poir. ? 



Apium nodiflorum, Bth. and Hk. {Slum nodiflorum, L.) 

 Pithranthus scoparia (^Deverra scoparia, Coss.) 

 Galium corrudcpfolium, Vill. 

 „ Poiretianum, Ball. 

 „ actimhmtum, Ball. 

 Asperula hirsuta, Desf. 

 Valerianella pumila, DC. 

 Bellis sylvesiris, Cyr. 



„ ccenilescens, Coss. 



„ ,, forma radiis albescenlibus. 



Gnaphalium helich-ysoides, Ball. 

 Anacyclus depressus, Ball. 

 Achillea Ugustica, All. 



Anthemis arvensis ? an potins J., tuherculata. 

 ,, tuberculata, Boiss. 



„ hetprophylla, Ball, ' Journ. Linn. Soc.,' xvi., 507. 

 Chrysanthemum catananche, Ball. 

 A. 

 B. 



At first sight I should refer the specimens marked B to G. aManticum, 

 Ball, and regard those marked A as a distinct and new species ; but I am 

 at present inclined to think that these, with Pyrethrum ]\[aresii, Coss., 

 must be united and regai'ded as forms of one species. What name that 

 species should bear is another question. Pyrethrum Maresii is the older 

 name, but C. atlanticum, Ball, will, I suppose, be taken by those who 

 refer all these to Chrysanthemum. 



I do not think, however, that the preliminary question can be decided 

 until we have mature fruits of all the forms. It appeared to me long 

 ago that the achene of C. atlanticum is somewhat different from that of 

 P. Maresii^ but there may be intermediate forms. — [Note by Mr. Ball.] 



Centaurea salmantica, L. 

 Calendula suffruticosa, Vahl. 

 Catananche ccerulea, L. 

 Hieracium Pilosella, L. var. 



